lkml.org 
[lkml]   [2020]   [Dec]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] iommu/hyper-v: Fix panic on a host without the 15-bit APIC ID support
From
Date
On Tue, 2020-12-01 at 16:45 -0800, Dexuan Cui wrote:
> The commit f36a74b9345a itself is good, but it causes a panic in a
> Linux VM that runs on a Hyper-V host that doesn't have the 15-bit
> Extended APIC ID support:
> kernel BUG at arch/x86/kernel/apic/io_apic.c:2408!
>
> This happens because the Hyper-V ioapic_ir_domain (which is defined in
> drivers/iommu/hyperv-iommu.c) can not be found. Fix the panic by
> properly claiming the only I/O APIC emulated by Hyper-V.
>
> Cc: David Woodhouse <dwmw@amazon.co.uk>
> Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
> Fixes: f36a74b9345a ("x86/ioapic: Use I/O-APIC ID for finding irqdomain, not index")
> Signed-off-by: Dexuan Cui <decui@microsoft.com>

Oops, apologies for missing that.

Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>



Amazon Development Centre (London) Ltd. Registered in England and Wales with registration number 04543232 with its registered office at 1 Principal Place, Worship Street, London EC2A 2FA, United Kingdom.


\
 
 \ /
  Last update: 2020-12-02 02:33    [W:0.058 / U:0.300 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site